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5MM AAA H WIA man @75 di@ uan I AA AIA AA .A .IIA IIIA [A IIIA IIAUNTTED STATES PATENT. OFFICE.

ARTHUR CAMERON, OF KALAMAZOO, MICHIGAN, AND THOMAS G. CHAPMAN,

OF CHICAGO, ILLINOIS, AASSIGIIORS TO FREDERICK C. AUSTIN, OF CHI- CAGO,ILLINOIS.

TUBULAR WELL. Y

SPECIFICATION forming part of Lettersklatent No. 449,'7'71, dated April'7, 1891.

Application filed .Tune 11, 1888. Serial No. 276,761. (No model.)

T @ZZ wwm it 71ML/ @OlwW/f As a means for retaining the packing in Be itknown that We, ARTHUR CAMERON, a place against the annular shoulder ofthe citizen of the United States, residing at Kala- .coupling-joint whenthe latter is unscrewed mazoo, in the county of Kalamazoo and State fromthe coupling and for preventing the 55 l of Michigan, and THOMAS G.CHAPMAN,asub packing from being drawn off the neck by ject of the Queenof Great Britain, residing reason of any tendency it may have to stickat Chicago, in the county of Cook and State to the coupling, the annularshoulder of the of Illinois, have inventedl a certain new andcheck-valve joint is provided with van a-nnulail useful Improvement inTubular lVells, of groove, into which a portion of the packing 6o 1owhich the followingis a specification. is forced, the mode of applyingthe packing Our invention relates to tubular wells of kbeing to firstfit it upon the neck, and then that class in which a plunger-cylinderand aA by the application of suitably-applied presscheck-valve are letdown and secured within ure force a portion of the material of which themain well-tube in order that a valved the packing is composed into theannular 65 I5 piston or plunger may be operated within the groove. Inthis way, while the visible porplunger-cylinder for the purpose ofpumping tion of the packing may present the appearup the water. Y anceof a fiat annular washer, it will upon in- The object of our inventionis to provide spection be found to have a portion of its reliable,simplified,and otherwise efficient and thickness crowded into theannular groove. 7o zo improved means for forming a secure and In thedrawings, Figurelrepresents in vertight connection between a joint thatis protical central section the lower portion of a vided with a seat fora check-valve and a tubular well containing our improvement. couplingwhich serves to connect the plun- Fig. 2 represents a section takentransversely ger-cylinder with the strainer-tube, and to through Figrlon line 2 2. Fig. 3 represents 75 dispense with various expensive andundea vertical central section through the lower sirable devices andconstructions which havel portion of the check-valve joint and theupbeen heretofore employed at such point in per portion ofthe coupling,with which it is tubular wells of the aforesaid general charconnected inaccordance with our improveacter. ment. Fig. 4 is an end view of thelower end 8o 3o In carrying out our invention the joint, of thecheck-valve joint with the packing rewhich is provided with acheck-valve and seat moved. Fig. 5 is an end view of the lower therefor,is at its lower end provided with an end of the plunger, which isadapted to eneXternally-threaded neck which is adapted gage the'check-valve joint in order that the to screw into the upper end ot' acoupling same may when desired be unscrewcd from 85 that serves toconnect the plunger-cylinder the coupling and be raised from the mainwith a strainer-point. At the point of j uncwell-tube. tion between saidthreaded neck and the In said drawings, A indicates the main wellbody ofthe check-valve joint an annular tube, B the strainer-point, and C acoupling, packing is iitted upon the neck, so as to lie which at itslower end is connected with the` 9o 4o against the annular shoulder,which is at such strainer-point and at its upper end screwed pointformed by the reduction that is made into the plunger-cylinder D. in thesize of the check-valve joint to provide The check-valve joint E isprovided with a the said neck. lVhen the neck of the checksuitable seatfor any desired form of checkvalve joint is screwed into the coupling,the valve E', and is at its lower. end provided with 9 5 packingwillbecompressed between the shoulan externally-threaded neck e, adapted toder oi; the check-valve joint andthe upper screw into theinternally-threaded upper end end of the coupling that is within thelower of the coupling C. The annular packing F portion of theplunger-cylinder, whereby a is fitted upon the neck with which thechecktight and exceedingly simple arrangement of valve joint is providedat its lower end, and roo 5o joint or connection between the check-valveis held at the point of junction between said joint and the coupling isattained. neck and the main body of the check-valve joint. At this pointof junction between the neck and the main body of the check-valve jointthe neck is preferably formed with an unthreaded portion which isencircled by the annular packing, whereby the retention of the packingupon the neck is assisted. The cheek-valve joint is at the point ofjunction between its neck and its main body portion provided with anannular shoulder, so that when the threaded neck is screwed down intothe coupling C the packing can be compressed between the shoulder andthe upper end of the coupling, in which way an extremely simple andtight joint or connection between the check-valve joint and the couplingis attained. The annular shoulder witlr which the checkvalve jointisprovided at e is grooved or channeled for the greater portion of itswidth, so as to provide it with an annular groove c2. (Best illustratedin Figs. 3 and 4.) The packing F should be made ofvsuch thickness thatwhen fitted upon the neck e and subjected to considerable pressure aportion et its thickness may be crowded into the annular groove c2, soas to tightly fill the same and yet leave a suitable thickness ofpacking below the groove, as in Fig. 3, wherein it will be seen thatwhile the groove is filled by a portion of the packing there is asuitable thickness of packing below the groove. The packing` thus havinga portion of the material of which it is composed wedged into thecheck-valve joint will be heldin connection therewith so firmly as toavoid all possibility of its becoming detached during the operation ofdetaching the check-valve joint from the coupling. Thile therefore theupper end of the coupling C provides a seat between which and theshoulder of the checkvalve joint the packing will be compressed when thethreaded neck of the ch eekvalve jointis screwed down into the coupling,the packing will be securely fitted to the check-valve joint, so thatall danger of its being left behind when the check-valve joint isdetached from the coupling will be avoided, no matter how much it maytend to stick to the said seat. In this connection it may also beobserved that the foregoing arrangement permits said packing to be madeof leather in place of the elastic packing more commonly provided at thelower end of the checkvalve joint, whereby a more durable packing isprovided.

The check-valve joint can be adapted to be engaged by any preferred toolsuitable for turning it, so as to unscrew it from the coupling, and forthen lifting it out from the welltube; or the plunger G may haveitslower end adapted, as at g, Fig. 5, to receive and engage the upperend of the check-valve joint, which last-mentioned matter is, however,well known in the art, and hence not herein particularly described.

Vhat we claim as our invention is- The combination, substantially ashereinbefore set forth, of the well-tube, the plungercylinder D,inclosed within the well-tube, the strainer-point, a coupling C,connected at its lower end with the strainer-point and having its upperend portion threaded both externally and internally, the saidexternallythreaded portion ofthe coupling being screwed directly into aninternally-threaded lower end portion of the plunger-cylinder, thecheckvalve joint arranged within the plunger-cylinder and provided witha threaded reduced lower end portion, forming the neck c, which engagesthe internally -threaded upper end portion ot the coupling C, and anannular groove e2, formed in the annular shoulder at the junction of theneck c with the body of the check-valve joint, and an annular packing F,arranged within said groove and held upon the upper end of the couplingC, which at said end tits between and engages the externally-threadedneck e of the check-valve joint and the internally-threaded portion otthe plringer-cylinder.

ARTHUR CAMERON. THOMAS G. CHAPMAN. NVitnesses:

CHAS. G. PAGE, A. DIcKINsoN.

